Madrid, 2 December 1975 and Berkeley, California, 8 January 1976 - Institutional correspondence A letter from José Mario Armero to Herschel B. Chip, with reply
Philadelphia, 3 May 1939 - Institutional correspondence The Medical Bureau and North American Committee's letter to the Exhibition Committee
Philadelphia, 10 May 1939 - Institutional correspondence A letter from the Medical Bureau and North American Committee to Evelyn Ahrend
1939 - Receipt Receipts for donation made to the Medical Bureau and North American Committee to Aid Spain Democracy